Hematology Practice Questions

Q: What type of anemia can develop in a baby fed exclusively on goat's milk?

Megaloblastic anemia. **Explanation:** The correct answer is **Megaloblastic anemia**. **Why it is correct:** Goat’s milk is notoriously deficient in **folate (Vitamin B9)** and **Vitamin B12**, and it contains significantly lower amounts of iron compared to breast milk. Folate is essential for DNA synthesis during the maturation of red blood cells. Exclusive goat's milk feeding leads to a deficiency in these hematinic factors, resulting in impaired DNA synthesis while RNA synthesis continues. This "nucleo-cytoplasmic asynchrony" leads to the formation of large, immature red blood cells known as megaloblasts, manifesting clinically as megaloblastic anemia. **Why the other options are incorrect:** * **Microcytic and Hypochromic anemia (Options B & C):** These are characteristic of Iron Deficiency Anemia (IDA). While goat's milk is low in iron, the most classic and rapid hematological complication associated specifically with goat's milk in pediatric literature is folate-deficiency megaloblastic anemia. * **Normochromic anemia (Option D):** This refers to RBCs with normal hemoglobin concentration, typically seen in anemia of chronic disease or acute blood loss, which does not align with the nutritional deficiency caused by goat's milk. **NEET-PG High-Yield Pearls:** * **"Goat Milk Anemia"** is a classic keyword for **Folate deficiency**. * Goat's milk has only about **6 μg/L of folate**, whereas cow's milk has ~50 μg/L and human milk has ~85 μg/L. * Goat's milk is also highly allergenic and has a high renal solute load, making it unsuitable for infants under 1 year of age. * Always look for **hypersegmented neutrophils** on a peripheral smear to confirm megaloblastic changes.

Q: What is the treatment of choice for severe ITP?

Intravenous immunoglobulin (IV gammaglobulins). **Explanation:** Immune Thrombocytopenic Purpura (ITP) in children is typically a self-limiting condition. However, in cases of **severe ITP** (defined by significant mucosal bleeding or a platelet count <10,000/mm³), rapid elevation of the platelet count is necessary to prevent life-threatening complications like intracranial hemorrhage. **Why IVIG is the Treatment of Choice:** Intravenous Immunoglobulin (IVIG) is the preferred treatment for severe ITP because it provides the **fastest rise in platelet count** (usually within 24–48 hours). It works by saturating the Fc receptors on splenic macrophages, thereby preventing the destruction of antibody-coated platelets. **Analysis of Other Options:** * **Steroids (Option D):** While steroids are the first-line treatment for *mild to moderate* symptomatic ITP, they take longer (3–7 days) to increase platelet counts compared to IVIG. * **Plasmapheresis (Option C):** This is used to remove circulating toxins or autoantibodies in conditions like TTP or Goodpasture syndrome, but it has no established role in the routine management of ITP. * **Bone Marrow Transplant (Option A):** BMT is used for bone marrow failure syndromes (e.g., Aplastic Anemia) or malignancies, not for peripheral destructive processes like ITP. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause** of isolated thrombocytopenia in an otherwise healthy child is ITP. * **Indication for treatment:** Treatment is based on **bleeding severity**, not just the absolute platelet count. * **Anti-D therapy:** Can be used as an alternative to IVIG in Rh-positive, non-splenectomized patients. * **Chronic ITP:** Defined as thrombocytopenia persisting for >12 months. Second-line agents include Rituximab or TPO-receptor agonists (Eltrombopag).

Q: A newborn girl presents with severe Purpura Fulminans. Her elder sibling died of severe purpura fulminans at 1 year of age. Two other siblings are normal. What is the diagnosis?

Protein C deficiency. **Explanation:** The clinical presentation of a newborn with **Purpura Fulminans** and a family history of a sibling death due to the same condition strongly points toward **Homozygous Protein C Deficiency**. **1. Why Protein C Deficiency is correct:** Protein C is a natural anticoagulant that inactivates Factors Va and VIIIa. In the rare autosomal recessive homozygous state, there is a complete absence of Protein C. This leads to unchecked thrombin generation, resulting in microvascular thrombosis, skin necrosis (Purpura Fulminans), and disseminated intravascular coagulation (DIC) shortly after birth. The family history suggests an autosomal recessive inheritance pattern (affected siblings, normal parents). **2. Why other options are incorrect:** * **Hemophilia A:** An X-linked recessive disorder causing Factor VIII deficiency. It presents with deep tissue bleeds or hemarthrosis, not purpura fulminans or neonatal skin necrosis. * **Immune Thrombocytopenic Purpura (ITP):** Usually occurs in older children following a viral infection. While it causes petechiae/purpura, it does not cause the life-threatening thrombotic necrosis seen in Purpura Fulminans. * **Von Willebrand Disease (vWD):** The most common inherited bleeding disorder, typically presenting with mucosal bleeds (epistaxis, menorrhagia) rather than neonatal thrombosis. **Clinical Pearls for NEET-PG:** * **Management:** Acute treatment involves **Fresh Frozen Plasma (FFP)** or Protein C concentrate. Long-term management requires oral anticoagulation (Warfarin). * **Warfarin-Induced Skin Necrosis:** Patients with heterozygous Protein C deficiency are at risk for skin necrosis when starting Warfarin without heparin bridging. * **Differential Diagnosis:** Consider **Protein S deficiency** or **Antithrombin III deficiency** in neonatal thrombosis, though Protein C deficiency is the classic association with Purpura Fulminans.

Q: What is the proper management of a child with an absolute neutrophil count (ANC) of 100/mm3?

Start broad-spectrum intravenous antibiotics.. ### Explanation **1. Why Option A is Correct:** The patient has **severe neutropenia** (defined as ANC < 500/mm³). In pediatrics, severe neutropenia is a medical emergency because the body’s primary defense against bacterial invasion is compromised. Patients with an ANC of 100/mm³ are at extremely high risk for life-threatening sepsis, often from their own endogenous flora (e.g., *Pseudomonas aeruginosa*, *E. coli*). The standard of care is the immediate initiation of **empiric broad-spectrum intravenous antibiotics** (e.g., Ceftazidime, Cefepime, or Piperacillin-Tazobactam) to cover Gram-negative and Gram-positive organisms, even before culture results are available. **2. Why Other Options are Incorrect:** * **Option B:** While physical exams and X-rays are important, "observing closely" is dangerous. Neutropenic patients often fail to mount a typical inflammatory response (like pus formation or lung consolidation), making clinical signs unreliable. Delaying antibiotics increases mortality significantly. * **Option C:** Granulocyte transfusions are rarely used and are reserved for specific cases of documented infection unresponsive to antibiotics; they are never the first-line management. * **Option D:** Iron and B12 treat specific anemias but do not address the acute risk of sepsis associated with severe neutropenia. **3. Clinical Pearls for NEET-PG:** * **ANC Calculation:** Total WBC count × (% Neutrophils + % Bands). * **Neutropenia Grading:** * Mild: 1000–1500/mm³ * Moderate: 500–1000/mm³ * Severe: 38.3°C (101°F) or >38.0°C (100.4°F) for one hour in a patient with ANC < 500/mm³. * **Common Sites:** The mouth (stomatitis), perianal area, and skin are the most common sites of infection in these patients.

Q: A child presented with fever, anemia, lymphadenopathy, and hepatosplenomegaly. Which of the following is LEAST likely to be a cause?

Aplastic anemia. ### Explanation The clinical presentation of **fever, anemia, lymphadenopathy, and hepatosplenomegaly** suggests an **infiltrative or infectious process** involving the reticuloendothelial system. **Why Aplastic Anemia is the Correct Answer:** Aplastic anemia is characterized by **pancytopenia** due to bone marrow failure. Crucially, it is a "quiet" marrow disease. Because there is no abnormal cellular proliferation or infiltration, **organomegaly (hepatosplenomegaly) and lymphadenopathy are characteristically absent**. If these signs are present, an alternative diagnosis (like leukemia) must be considered. **Analysis of Incorrect Options:** * **Acute Lymphoblastic Leukemia (ALL):** This is the most common childhood malignancy. Malignant lymphoblasts infiltrate the bone marrow (causing anemia/fever) and the lymphoid tissues, leading to prominent lymphadenopathy and hepatosplenomegaly. * **Tuberculosis (TB):** Disseminated or miliary TB in children frequently presents with constitutional symptoms (fever, weight loss), anemia of chronic disease, and generalized lymphadenopathy with hepatosplenomegaly. * **Leishmaniasis (Kala-azar):** This protozoal infection is a classic cause of massive splenomegaly, hepatomegaly, and pancytopenia (including anemia) due to splenic sequestration and marrow infiltration. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** In a child with pancytopenia, the **presence of splenomegaly** points towards Leukemia or Gaucher’s disease, while its **absence** points towards Aplastic Anemia. * **Aplastic Anemia Triad:** Anemia (pallor), Leukopenia (infections), and Thrombocytopenia (mucosal bleeds/petechiae). * **Kala-azar:** Look for "hyperpigmentation" and "massive splenomegaly" in the clinical vignette.

Q: The likely diagnosis in a child presenting with limb pain and pancytopenia is:

Acute lymphocytic leukemia. **Explanation:** The clinical combination of **pancytopenia** and **bone/limb pain** in a child is a classic presentation for **Acute Lymphocytic Leukemia (ALL)**. 1. **Why ALL is correct:** ALL is the most common pediatric malignancy. Pancytopenia occurs due to the replacement of normal bone marrow elements by leukemic blasts (myelophthisis), leading to anemia, leukopenia, and thrombocytopenia. The **limb pain** (often severe enough to cause a limp or refusal to walk) is a hallmark feature caused by the expansion of the marrow cavity by leukemic cells or subperiosteal infiltration. 2. **Why other options are incorrect:** * **Aplastic Anemia:** While it presents with pancytopenia, it is characteristically **painless**. There is no infiltration of the bone or periosteum. * **Rheumatic Fever:** Presents with migratory polyarthritis (joint pain), but it does not cause pancytopenia. It is typically associated with leukocytosis and elevated ESR/CRP. * **Rheumatoid Arthritis (JIA):** Causes joint pain and swelling. While chronic disease may cause anemia of chronic inflammation, it does not lead to true pancytopenia. **High-Yield Clinical Pearls for NEET-PG:** * **Most common age:** 2–5 years. * **Bone Pain:** Present in ~25% of cases; often misdiagnosed as "growing pains" or juvenile idiopathic arthritis. * **Radiology:** Look for "Leukemic lines" (transverse metaphyseal radiolucent bands) on X-ray. * **Diagnosis:** Bone marrow aspiration showing **>20% blasts**. * **Prognosis:** ALL has an excellent cure rate (>90% in favorable subtypes). Hyperdiploidy and t(12;21) carry a good prognosis, while the Philadelphia chromosome t(9;22) carries a poor prognosis.

Q: A 4-month-old infant presents with anemia (hemoglobin 9.5 g/dL) and a normal MCV (77 fL). The infant is breastfed, shows normal growth parameters, and appears well. What is the most likely cause of her anemia?

Inadequate dietary iron. **Explanation:** The most likely cause of anemia in this 4-month-old infant is **inadequate dietary iron**. **1. Why Option A is Correct:** Full-term infants are born with iron stores sufficient for the first **4 to 6 months** of life. Breast milk, while highly bioavailable, contains very low concentrations of iron (approx. 0.3–0.5 mg/L). By 4 months of age, these endogenous stores begin to deplete. If there is no exogenous supplementation or introduction of iron-rich complementary foods, the infant develops **Iron Deficiency Anemia (IDA)**. In the early stages of IDA, the MCV may still be within the low-normal range (normocytic) before progressing to classic microcytic hypochromic anemia. **2. Why Other Options are Incorrect:** * **B. Hemolysis:** This would typically present with jaundice, hepatosplenomegaly, or an elevated reticulocyte count, none of which are mentioned. * **C. Late clamping of the umbilical cord:** This actually *increases* neonatal iron stores and protects against anemia in the first 6 months of life. * **D. Iron malabsorption:** This is rare in an otherwise healthy, well-growing infant and is usually associated with conditions like Celiac disease or chronic diarrhea. **Clinical Pearls for NEET-PG:** * **Physiological Anemia of Infancy:** Occurs at **8–12 weeks** (Hb ~11 g/dL) due to a drop in erythropoietin after birth; it is asymptomatic and requires no treatment. * **Preterm Infants:** Deplete iron stores much earlier (**by 2 months**) because most iron transfer occurs during the third trimester. * **MCV Norms:** In infants, the MCV is naturally lower than in adults (Normal at 4 months: 70–85 fL). * **Prophylaxis:** Exclusively breastfed full-term infants should start oral iron supplementation (1 mg/kg/day) at **4 months** of age.

Q: What is the most common inherited form of aplastic anemia?

Fanconi anemia. **Explanation:** **Fanconi Anemia (FA)** is the most common cause of inherited (constitutional) aplastic anemia. It is primarily an autosomal recessive disorder characterized by a defect in **DNA repair** (specifically, the repair of DNA interstrand cross-links). This leads to progressive bone marrow failure, typically manifesting in the first decade of life (median age 7–8 years). **Why the other options are incorrect:** * **Shwachman-Diamond Syndrome:** This is the second most common inherited cause of pancreatic insufficiency (after Cystic Fibrosis). While it involves bone marrow failure, it typically presents first with **neutropenia** and skeletal abnormalities, rather than generalized aplastic anemia. * **Diamond-Blackfan Anemia:** This is a **pure red cell aplasia**, not a generalized aplastic anemia. It presents early in infancy (usually <1 year) with macrocytic anemia and normal leukocyte/platelet counts. * **Dyskeratosis Congenita:** This is a rare telomere biology disorder. While it causes aplastic anemia, it is less common than Fanconi Anemia and is characterized by a classic triad of abnormal skin pigmentation, nail dystrophy, and oral leukoplakia. **High-Yield Clinical Pearls for NEET-PG:** * **Physical Findings in FA:** Short stature, **absent or hypoplastic thumbs/radius**, microcephaly, and café-au-lait spots. * **Gold Standard Diagnosis:** **Chromosomal Breakage Analysis** using Clastogenic agents like Diepoxybutane (DEB) or Mitomycin C. * **Malignancy Risk:** Patients have a significantly increased risk of developing **AML** and squamous cell carcinomas (head, neck, and anogenital). * **Treatment:** Hematopoietic Stem Cell Transplant (HSCT) is the definitive treatment for hematologic manifestations.

Question 1

What type of anemia can develop in a baby fed exclusively on goat's milk?

Accepted Answer

Megaloblastic anemia

Answer

Microcytic anemia

Answer

Hypochromic anemia

Answer

Normochromic anemia

Question 2

What is the treatment of choice for severe ITP?

Accepted Answer

Intravenous immunoglobulin (IV gammaglobulins)

Answer

Bone Marrow Transplant (BMT)

Answer

Plasmapheresis

Answer

Steroids

Question 3

Which of the following is true about Chronic Myeloid Leukemia (CML) in children?

Accepted Answer

Protein tyrosine kinase inhibitors are used in the treatment of CML.

Answer

The Philadelphia chromosome results from a translocation between the long arm of chromosome 9 and the short arm of chromosome 22.

Answer

CML commonly presents as blast crisis.

Answer

CML is the second most common leukemia in children.

Question 4

A newborn baby presented with profuse bleeding from the umbilical stump. Rest of the examination and PT, APTT are within normal limits. Most likely diagnosis is which of the following?

Accepted Answer

Glanzmann's thrombasthenia

Answer

Factor X deficiency

Answer

Von Willebrand disease

Answer

Bernard-Soulier disease

Question 5

A newborn girl presents with severe Purpura Fulminans. Her elder sibling died of severe purpura fulminans at 1 year of age. Two other siblings are normal. What is the diagnosis?

Accepted Answer

Protein C deficiency

Answer

Hemophilia A

Answer

Immune Thrombocytopenic Purpura (ITP)

Answer

Von Willebrand disease (vWD)

Question 6

What is the proper management of a child with an absolute neutrophil count (ANC) of 100/mm3?

Accepted Answer

Start broad-spectrum intravenous antibiotics.

Answer

Perform a careful physical examination and chest radiograph; observe closely pending results of blood cultures.

Answer

Administer granulocyte transfusion.

Answer

Provide nutritional support with oral iron and intramuscular vitamin B12.

Question 7

A child presented with fever, anemia, lymphadenopathy, and hepatosplenomegaly. Which of the following is LEAST likely to be a cause?

Accepted Answer

Aplastic anemia

Answer

Acute lymphoblastic leukemia (ALL)

Answer

Tuberculosis (TB)

Answer

Leishmaniasis

Question 8

The likely diagnosis in a child presenting with limb pain and pancytopenia is:

Accepted Answer

Acute lymphocytic leukemia

Answer

Aplastic anemia

Answer

Rheumatic fever

Answer

Rheumatoid arthritis

Question 9

A 4-month-old infant presents with anemia (hemoglobin 9.5 g/dL) and a normal MCV (77 fL). The infant is breastfed, shows normal growth parameters, and appears well. What is the most likely cause of her anemia?

Accepted Answer

Inadequate dietary iron

Answer

Hemolysis

Answer

Late clamping of the umbilical cord

Answer

Iron malabsorption

Question 10

What is the most common inherited form of aplastic anemia?

Accepted Answer

Fanconi anemia

Answer

Shwachman-Diamond syndrome

Answer

Diamond-Blackfan anemia

Answer

Dyskeratosis congenita

Hematology — MCQs

Hematology — MCQs

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